by dtc » Thu May 14, 2015 5:16 am
Is the fibreglass still sticking to the blank or it is loose/bubbling? As old man says, I think your task is to cut away all of the delaminated glass, sand back the epoxy and do a better job on it, then re-glass it. However, if the fibreglass is sticking in parts and delaminating in parts, it could be a tough job, lots of sanding or cutting away at the blank to get it off - it wont peel away easy; and if you leave any it will be lumpy (which isn't a problem but it will look a bit strange). You may need to repair the blank.
In Australia fibreglass cloth is about $7/m, so you may need 3-4m (well, depending on how much repair is required), plus 1-2L of resin (at $30 /L) plus sanding pads and catalyst (maybe $30+ depending on what you get), some tape, cleaning products ($15) and safety equipment (masks and gloves essential). Hours of your time. I cant imagine you will get away with much under $100 at the very least, and perhaps even double that assuming you have no equipment at the moment (and assuming that pricing where you live is much the same as Australia, give or take).
That's also assuming the fin box and plugs don't need any replacement.
However, if there is no delamination (the existing fibreglass is still fixed to the board), then you could probably get away with fixing up the epoxy job (sanding back and doing it up again) and some patching - wont look all that pretty but will work. Sanding will take a while... If there is only slight delam, you can use a syringe to squeeze resin-hardener mix into the delam area through a small hole and 'gluing' the cloth back to the foam and maybe some patching on top.
If you have an interest in repairing boards or building your own board, then this is the perfect one to start on - you will learn heaps and if you muck it up, it wont really matter. Not like it matters when you muck up the glassing on your personally hand designed and shaped blank with the fancy spray job...